Liquid heater



June 25, 1929. B. w. MACY LIQUID HEATER l Filed June 4, 1928 u' II INVENTOR WMgy;

ATTORNEY 1 31:15:! Illini llvnrfllln 51:; fin! 2@ tube 45 lee abstracted tem the tithe et Witho 5o generally pre:

joints of the arm are pivoted together at 32 and tothe base at 33." Stops 34 limit the movements of the arm. A

One end of the upper arm joint carries a contact which is engagealole with another" Contact on the contact bai l),- That loar is Asecured to the lease 29 as at 35,'hut is insulated therefrom at '36 as plainly1 shown in l@ Figure t. @ne end of the other anni joint is forked 'at 37 to receive the vtree end ot" the yieldable'element 18. 'lhat eleinent is electrically connected --with the hase.

A. loall check-valve 38 provides for the release ot any gas under pressure in the heater' tuloe Il. This Valve has connection with the departing from the spirit of the invention or the` scope of the claims.

1. A heater comprising a tank, a closedended tube' extending into and secured to `the tank, and, an electrical heating unit insert-able into the tube comprising the following: a base plate securableto-the tube, a vheating element, terminal connections for said element including a thermostat and a pair ot rods depending from the base plate, a pa'ir of insulating sleeves to one of ywhich the thermostat is' attached, spacer bars foi' the heating element losing spaced from cach other and from the lease plate. by said sleeves, and a stud (3o-extensive with the tulaethroug'h a pipe 39. The tuhe 4- afili loci heating unit, holding the parte ot the latteil filled with oil ot a suitalole lind, 'the eiiect of the elenfien'tsl l5 ,being t'o heat the oil and t, hence the liquid in which the latter is immersed will loe heated'.

'lllie operation is readily uncleistoocl, Upon completing an electrical circuit throu h the elements l5 thelatter will to heat the oil Within the tulie t, which latter will heat the -water orothei lil-Suid Within the tank l. l/Vhen the heat reaches a degiee to cause-flexing of the' thermostatic element l@ into the dotted line position the resulting rockin ol the joints ofthe arm 3l will separate tne electrical contacte at the liar 'J9 and open the circuit until the internal temperature drops suliciently toperniit flexing' of the element 18 to the lull line position. An

automatic control is thus e'li'ectedu Not et' the leastv importance is the specific manner in which the heatingn unit is conaloined 'with vthe L, The 'tube l constitutes a ized partei? the being Welded.

ce in place as 'lt is virtually receptacle.

'for the heating# All. et the ele-men the 'latten ane cairied by the lease and. Twhen lease plate is ioosene 1 the connecting' ring;` ti' the o so muchas cutting, onf the city ci ine the tank aile the construction and ot the improved liquid is that et n n :red zorin, obviously n' eilig Aes may lee made cations and cri assembled. p

resistinice Wires, a pair of terminal rods depending i'roin the lease plate and loeing respectively connected with one end of each "'Wire, a yieldalole element to which the rcniaining end oli one wire is connected, a contact har with which the other end oli the reinaining Wire is connected, a jointed arm operable hy the yieldalele element, a base to which said element and arms are attached, insulating sleeves by one oit which said hase is carried, spacer liars tor the resistance Wires, loeing spaced 'from each other and Afrom the hase plate by said sleeves, and a stud running,- thnough the loai's and sleeves holding the parte et the unit'assembled.

3. A heater tube containing a quantity ot oil and being inimersilole in a iiuid to he heated, an electrical heating unit supported in the tube and immersed in oil, and a thermostat included in, an electrical circuit Y which embraces the heating unit, also being; 

